package hfut.example.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import hfut.example.common.R;
import hfut.example.entity.Employee;
import hfut.example.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {
    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee  @RequestBody接收Json对象
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        //1.密码进行MD5加密
        String password = employee.getPassword();
        password=DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据用户名查数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);

        //3.返回结果
        if(emp==null){
            return R.error("账户错误");
        }

        //4.比较密码
        if (!emp.getPassword().equals(password)) {
            return R.error("密码错误");
        }

        //5.查看状态
        if(emp.getStatus()==0){
            return R.error("账号已禁用");
        }

        //6.登录成功
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     *退出
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param request 用于获取创建人
     * @param employee @RequestBody解析Json对象
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工,员工信息:"+employee.toString());
        //设置初始密码"123456"
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));

/*        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);*/

        employeeService.save(employee);

        return R.success("新增员工成功");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);

        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);
        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        //添加一个过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        //执行查询
        employeeService.page(pageInfo,queryWrapper);

        return R.success(pageInfo);
    }

    /**
     * 根据Id修改员工信息(编辑与禁用都用到了该方法)
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody Employee employee){
        log.info(employee.toString());


/*        Long empId = (Long) request.getSession().getAttribute("employee");
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(empId);*/
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    /**
     * 据Id查询员工信息,即修改员工信息时回显员工信息
     * @param id @PathVariable表示路径变量
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据Id查询员工信息");
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("未查询到员工信息");
    }
}
